In Dixieland (where Enoch Powell was MP) (4,5)

'enoch powell was mp' is the definition.
I don't know anything about this answer so I can't judge whether this works.

'in dixieland' is the wordplay.
I cannot quite see how this works, but
'dixieland' could be 'south' (synonyms) and 'south' is found in the answer.
The remaining letters 'down' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).

'where' is the link.

Can you help me to learn more?